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Redundancy

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Encyclopedia of Operations Research and Management Science

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Redundancy is an engineering method of improving system and equipment reliability. Mainly, redundancy consists in using extra units (subsystems, modules and/or additional elements) within the system to increase reliability. This kind of redundancy is usually called structural. Redundancy might be called functional when a system may perform the same operation by several different ways. For instance, a communication network may be able to by-pass its failed links or switches. Another possibility is time redundancy , where the system has extra time for possible repetition of the same operation after a failure. As an example, one can consider a computer system with restarting in the case of error. In this article, we only consider structural redundancy.

Redundancy may be implemented on the system or unit levels. By system-level redundancy, we mean that an entire system would be replaced upon its failure by an identical structure; by unit-level redundancy, we mean that an individual unit...

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References

  1. Barlow, R.E. and Proschan, F. (1981). Statistical Theory of Reliability and Life Testing: Probability Models, 2nd ed. To Begin With, Silver Spring, Maryland.

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  2. Gnedenko, B. and Ushakov, I.A. (1995). Probabilistic Reliability Engineering. John Wiley, New York.

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  3. Kozlov, B.A. and Ushakov, I.A. (1970). Reliability Handbook. Holt, Rinehart and Winston, New York.

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  4. Ushakov, I.A., ed. (1994). Handbook of Reliability Engineering. John Wiley, New York.

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Author information

Authors and Affiliations

  1. QUALCOMM, Inc., San Diego, California, USA

    Igor Ushakov

Authors
  1. Igor Ushakov
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Editor information

Editors and Affiliations

  1. Robert H. Smith School of Business, University of Maryland, College Part, Maryland, USA

    Saul I. Gass

  2. School of Information Technology & Engineering, George Mason University, Fairfax, Virginia, USA

    Carl M. Harris

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© 2001 Kluwer Academic Publishers

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Ushakov, I. (2001). Redundancy . In: Gass, S.I., Harris, C.M. (eds) Encyclopedia of Operations Research and Management Science. Springer, New York, NY. https://doi.org/10.1007/1-4020-0611-X_868

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  • DOI: https://doi.org/10.1007/1-4020-0611-X_868

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  • Publisher Name: Springer, New York, NY

  • Print ISBN: 978-0-7923-7827-3

  • Online ISBN: 978-1-4020-0611-1

  • eBook Packages: Springer Book Archive

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